Animals, Blotting, Western, Chromatin Immunoprecipitation, Diaphragm, Gene Expression Regulation, In Vitro Techniques, Mice, Mice, Inbred C57BL, Muscle Proteins, Muscle, Skeletal, Muscular Dystrophy, Animal, NF-kappa B, Promoter Regions, Genetic, Proto-Oncogene Proteins c-akt, Reverse Transcriptase Polymerase Chain Reaction, Signal Transduction, Stress, Mechanical, Transcription Factor AP-1